Don’t stop, kid.
Don’t worry about the chest pains, just you worry about what is going on inside your brain. Is it productive? Is it useful? Don’t even worry about being truthful, just hold yourself together and push on.
If you said that you enjoyed your work, it’s true that you’d be wrong, but you must convince yourself, by reason or by stealth, that you wanted this and that you will continue, never tiring, never flagging, disregard the physical and focus on ideal.
No structure. You don’t need it. You can push and bite and think and know that everything is fine when you are working hard. Don’t tell me that you are set to go far – you don’t know. Set no goals, achieve nothing measurable, simply work with your defiance as a motivation.
Anger for no reason. Discipline for its own ends. Focus on unfocussed, fragile, short-term hopes and dreams.
Cough up blood, and sometimes fray a little at the seams.